The two things that seem to set them apart (I may not know enough about the other company) is that:
1. TPAC's bearings are NAVAIR approved, which will give them an in with companies having elevated standards for those bearings.
2. They are the only company that will be producing those NAVAIR approved bearings in China itself (though using some component materials made in US) which will allow them to meet the official preferences that have to be given by Chinese companies for Chinese products, and avoiding import costs. So, even if a US company is producing the same bearings, whether NAVAIR approved or not, TPAC will have an advantage selling to Chinese companies.
Just my understanding.